"Terminal Island" (1973) is a uniquely dreadful exploitation film set in the near future where convicts are marooned on an island and must fend for themselves. Like an alternate universe version of "Survivor" except with a bit more brutality, slavery, sex, and death.
Clips: Here, beautiful Phyllis Davis exhibits perfect form in a seduction bathing scene. Of interest to students of film (and pulchritude) is the final edited version followed by several rare and revealing out-takes that are well worth a look.
See "Sweet Sugar" for the trailer & more Davis out takes from this tropical Women in Prison potboiler